linux-kernel - Re: [PATCH 2/4] arm: dts: qcom: qdu1000: Add SDHCI node

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Date:   Sat, 20 May 2023 13:23:32 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Komal Bajaj <quic_kbajaj@...cinc.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Bhupesh Sharma <bhupesh.sharma@...aro.org>
Cc:     linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/4] arm: dts: qcom: qdu1000: Add SDHCI node



On 19.05.2023 10:51, Komal Bajaj wrote:
> Add sdhc node for eMMC on QDU1000 and QRU1000 SoCs.
> 
> Signed-off-by: Komal Bajaj <quic_kbajaj@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/qdu1000.dtsi | 60 +++++++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qdu1000.dtsi b/arch/arm64/boot/dts/qcom/qdu1000.dtsi
> index 734438113bba..6113def66a08 100644
> --- a/arch/arm64/boot/dts/qcom/qdu1000.dtsi
> +++ b/arch/arm64/boot/dts/qcom/qdu1000.dtsi
> @@ -19,6 +19,10 @@
> 
>  	chosen: chosen { };
> 
> +	aliases {
> +		mmc0 = &sdhc_1; /*SDC1 eMMC slot*/
> +	};
> +
>  	cpus {
>  		#address-cells = <2>;
>  		#size-cells = <0>;
> @@ -842,6 +846,62 @@
>  			#hwlock-cells = <1>;
>  		};
> 
> +		sdhc_1: mmc@...4000 {
> +			compatible = "qcom,qdu1000-sdhci", "qcom,sdhci-msm-v5";
> +			reg = <0x0 0x08804000 0x0 0x1000>,
> +			      <0x0 0x08805000 0x0 0x1000>;
> +
confusing newline
> +			reg-names = "hc", "cqhci";
> +
> +			interrupts = <GIC_SPI 207 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 223 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "hc_irq", "pwr_irq";
> +
> +			clocks = <&gcc GCC_SDCC5_AHB_CLK>,
> +				 <&gcc GCC_SDCC5_APPS_CLK>,
SDCC>5<?

> +				 <&rpmhcc RPMH_CXO_CLK>;
> +			clock-names = "iface", "core", "xo";
Please keep one per line

> +
> +			/* Add dt entry for gcc hw reset */
> +			resets = <&gcc GCC_SDCC5_BCR>;
5?

> +
> +			interconnects = <&system_noc MASTER_SDCC_1 0 &mc_virt SLAVE_EBI1 0>,
> +					<&gem_noc MASTER_APPSS_PROC 0 &system_noc SLAVE_SDCC_2 0>;
> +			interconnect-names = "sdhc-ddr", "cpu-sdhc";
> +			power-domains = <&rpmhpd QDU1000_CX>;
> +			operating-points-v2 = <&sdhc1_opp_table>;
> +
> +			iommus = <&apps_smmu 0x0080 0x0>;
Please remove the leading zeroes from the stream id


> +			dma-coherent;
> +
> +			bus-width = <8>;


----
> +			non-removable;
> +			supports-cqe;
> +
> +			no-sd;
> +			no-sdio;
> +
> +			mmc-ddr-1_8v;
> +			mmc-hs200-1_8v;
> +			mmc-hs400-1_8v;
> +			mmc-hs400-enhanced-strobe;
> +			cap-mmc-hw-reset;
----
This bit is board-specific

> +
> +			qcom,dll-config = <0x0007642c>;
> +			qcom,ddr-config = <0x80040868>;
> +
> +			status = "disabled";
> +
> +			sdhc1_opp_table: opp-table {
> +				compatible = "operating-points-v2";
> +
> +				opp-384000000 {
> +					opp-hz = /bits/ 64 <384000000>;
> +					required-opps = <&rpmhpd_opp_min_svs>;
You added interconnects, but not any opp-peak-kBps / opp-avg-kBps,
presumably mistakengly?

Also, 384Mhz + min_svs sounds a bit weird? Is that the correct
level for this SoC?

Konrad
> +				};
> +			};
> +		};
> +
>  		pdc: interrupt-controller@...0000 {
>  			compatible = "qcom,qdu1000-pdc", "qcom,pdc";
>  			reg = <0x0 0xb220000 0x0 0x30000>, <0x0 0x174000f0 0x0 0x64>;
> --
> 2.17.1
>